Kollmorgen S772 Instruction Manual page 47

Kollmorgen
6.9.10.2 SIL CL3 / PLe Dual Channel control
To achieve PLe / SIL CL3, the safe switching of the pulse inhibitor must be tested periodi-
cally by analyzing the feedback signal from a safety control:
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l
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The inputs STO1-ENABLE and STO2-ENABLE are switched in turns according to a
defined test sequence. The switching states of the pulse inhibitor are available at the sta-
tus outputs of the S748/772 and are analyzed by a safety control.
The test sequence for the functional test of the safe pulse inhibitor must be performed as
shown in the following time chart.
Prerequisites for the start of the test sequence:
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Legend:
24V DC
X4/1
BTB/RTO
X3B/14,15
Enable
X3A/1
STO1-Enable
X4/7
STO2-Enable
X4/5
X4/8
X4/6
STO1-ENABLE: digital input, 1st switch-off path
STO1-STATUS: digital output, switching state of pulse inhibitor 1st switch-off path
STO2-STATUS: digital output, switching state of pulse inhibitor 2nd switch-off path
T1 ... T5: Test sequence
Start: Start of test sequence
S748-S772 Instructions Manual
At the start of a system
At the restart after triggering a protective device
At least every 8 hours by the operator.
Operational readiness BTB/RTO = "1"
Enable signal ENABLE = "0"
STO1-ENABLE and STO2-ENABLE = "0"
U
U
U
U
U
U
U
11/2018
T1 T2 T3
Start
STO2-ENABLE: digital input, 2nd switch-off path
End: End of test sequence
Technical description
T4 T5
End
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t
t
t
t
t
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